18877022208 has 432 divisors, whose sum is σ = 62660438295. Its totient is φ = 5471600640.

The previous prime is 18877022201. The next prime is 18877022233. The reversal of 18877022208 is 80222077881.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 9438511104 + 9438511104 = 97152^2 + 97152^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=97152.

It is not an unprimeable number, because it can be changed into a prime (18877022201) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 820740085 + ... + 820740107.

Almost surely, 2^18877022208 is an apocalyptic number.

18877022208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18877022208

18877022208 is an abundant number, since it is smaller than the sum of its proper divisors (43783416087).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18877022208 is an equidigital number, since it uses as much as digits as its factorization.

18877022208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The spelling of 18877022208 in words is "eighteen billion, eight hundred seventy-seven million, twenty-two thousand, two hundred eight".